JPS58108237A - Manufacture of unfoamed antistatic synthetic resin molded article - Google Patents

Abstract

PURPOSE:To obtain an unfoamed antistatic synthetic resin molded article, by kneading a thermoplastic resin or a thermosetting resin with a quaternary ammonium slat, filling the composition in a mold, and removing from the mold after heating. CONSTITUTION:100pts.wt. of a thermoplastic resin or a thermosetting resin is mixed and kneaded with 0.5-20pts.wt. of a quaternary ammonium salt, preferably a cationic quaternary ammonium salt, especially the compound of formula[C12H25(N)(CH3)3]ClO4, and the composition is filled in a mold, and removed therefrom after heating. The composition may be incorporated if necessary with an ordinary additive such as crosslinking agent, stabilizer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a non-foamed synthetic resin molded article with no chargeability. ◎Synthetic resins are roughly divided into two types: thermoplastic resins and thermosetting resins.The former includes ethylene- Vinyl acetate copolymer resin (hereinafter referred to as EVA), ethylene resin, ? It includes listyrene resin, acrylic resin, vinyl chloride slI resin, etc., and for those who are not familiar with it, acrylonitrile-butadiene-
Styrene copolymer resin (hereinafter referred to as A88 resin), polyester resin, and polyurethane resin contain 0, and all of these synthetic resins have traditionally been made into non-foamed molded products by injection molding, extrusion molding, and press molding methods. It is molded into automobiles, pants, various instruments, building materials, etc.
It is used for a wide range of purposes as other industrial materials. In this way, non-foamed synthetic resin molded products have grown into essential materials for modern society and everyday life, but on the other hand, they all have the disadvantage of being charged with static electricity. . For this reason, for example, when these non-foamed molded bodies are processed into automobile parts, they become electrically charged due to friction during processing, and dust in the atmosphere adheres to the surface.
For this reason, fI! When dressed up, it looks great! !
There was a problem that uneven loading occurred. In addition, static electricity naturally occurs in finished products, and as a result, product users often experience an unpleasant shock from the discharge of static electricity when they touch metal. .

The problem caused by this electrostatic charge in non-foamed synthetic resin molded products is as follows.
Since these molded bodies are used in an extremely wide range of applications, the practical adverse effects caused by them are too large to be ignored.Therefore, there has been a strong demand for non-foamed synthetic resin molded bodies that do not have electrostatic properties. The present invention has been developed in view of the above circumstances, and provides a method for dispensing a non-foamed non-foamed molded article of a non-static thermosetting resin and a method for producing a non-foamed non-foamed molded non-static thermosetting resin.

That is, the first invention of the present application is a method of adding and kneading 0.5 to 201 J parts of a quaternary ammonium salt and, if necessary, ordinary additives such as a crosslinking agent and a stabilizer to 100 parts by weight of a thermoplastic resin. The second invention of the present application is a manufacturing method in which thermosetting S decoy 1 (for 10 parts by weight, quaternary grade Add and mix 0.5 to 20 parts by weight of ammonium salt and the usual additives for cross-linking agents and stabilizers depending on the required amount*, b, fill it into any mold, and heat it or remove it. This is a method for producing a non-static thermosetting resin thermally foamed acid molded body, which is characterized by molding.

11EVA as the thermoplastic resin in the first invention of the present application
S/liethylene resins, acrylic resins, polyvinyl chloride resins, and currently used thermoplastic resins can be used. Further, as the thermosetting resin in the second invention of the present application, currently used thermosetting resins such as 18B, de-reester resin, polyurethane resin, and polyurethane resin can be used.

The quaternary ammonium salt used in the present invention is commonly used as a surfactant, and has the general formula R4NX (
If R is an alkyl or aryl group, and 4 is... r or an acid group, it can be used. However, according to experimental results, cationic quaternary ammonium salts (C,... It has been found that I(□(NXCH,),)Ca2 (manufactured by Nippon Oil & Fats Co., Ltd., trade name: Nirō-Elegan A ni Tame-Niregan AI) has a particularly excellent antistatic effect. The addition of this quaternary ammonium salt eliminates the charging property of the non-foamed synthetic resin molded product, and the amount added is 0 per 100 parts of the synthetic resin in both the first and second inventions. .5 to 20 parts by weight.If the amount added is less than 0.5 parts by weight, sufficient effects cannot be obtained.
Even if a large amount (20 parts by weight) is added, no further effect can be obtained.

As the crosslinking agent and stabilizer used as necessary in the present invention, those commonly used in the production of various synthetic resin molded bodies may be used.

Additionally, commonly used additives other than those mentioned above include colorants and fillers.

In carrying out the present invention, the above-mentioned mixed raw materials may be thoroughly kneaded, filled into an arbitrary mold, and heated and molded in exactly the same manner as conventional molding methods.

According to the method of the present invention, as shown in the results of the following examples, it is possible to obtain a non-electrostatic synthetic resin non-foamed molded product, which eliminates the static charge associated with conventional synthetic resin non-foamed molded products. Solving problems caused by electricity ==V possible.

Examples of the present invention will be described below.

Example I 100 parts by weight of I-lyethylene resin and dicumyl/? - Add a mixture of 5.0 parts by weight of quaternary ammonium Hanawa Nini Regan AI to 2 parts by weight of oxide and 2 parts by weight of zinc stearate, knead with a roll, and then 10 m
All filled in a mold of X200-×200-! The mold was heated at 160° C. for 15 minutes using a press, and then removed from the mold to obtain a non-foamed ethylene resin.

Comparative Example 1 A non-foamed polyethylene resin was obtained by molding under the same conditions as in Example 1 except for 2-Element Al.Example 2 Calcilla carbonate was added to 100 parts by weight of Listerene resin. A
3 Weight 1i Kl quaternary ammonium salt 2-crystal Niregan Al 5. A mixture of 3 parts of O was added, mixed with a roll, and filled into a 10m x 200mm x 200mm mold. ◎Next, the temperature was lowered to 70°C by heating in a press at 160°C for 15 minutes and removed. A non-foamed polystyrene resin was obtained by molding.

Comparative Example 2 A non-foamed polystyrene resin was obtained by molding under the same conditions as in Example 2 except for Futajima-Elegan Al and Kera.

Example 3 100 parts by weight of ffA resin, 3 parts by weight of silica and quaternary ammonium salt
The parts by weight were mixed and the good ones were added, kneaded with a roll, and then filled into a 10×200×200× mold. Gauze and press! The mixture was heated at 160° C. for 10 minutes, and then the temperature was lowered to 50° C., the mold was removed, and the heat-foamed resin was removed.

Comparative Example 3 In Example 3, Elegan AI was molded under the same conditions except Ift+ to obtain non-foamed EVA @ fat.Example 4 100111 parts of PVC resin was mixed with 3 parts by weight of silica. A mixture of 8.0 parts of quaternary ammonium, 22-elm, and Al was added to the mixture and kneaded with a roll.
Fill a 1 x 200cm mold.9. Subsequently, after heating at 160° C. for 15 minutes using a press, the temperature was lowered to 60° C., and the mold was demolded to obtain a non-foamed PVC resin.

Comparison 9114 Non-foamed PVC ARP was obtained by molding under the same conditions except for Futajima-Elegan Aj in Example 5 5 parts by weight of silica KI [t
7.0 parts by weight of 7.0 parts by weight of ammonium salt Nijima-Niregan Al were mixed, added with good ingredients, kneaded with a roll, and after 10 minutes
It was filled into a 200cm x 200cm mold. Subsequently, the edges were heated at 160° C. for 25 minutes using a press machine, the temperature was lowered to 60° C., and the mold was removed to obtain a thermally foamed AB8 resin.

Comparative Example 5 *A non-foamed ABS resin was obtained by molding under the same conditions as in Example 5 except for Futame-Elegan Al and Keratin.

When we examined the chargeability of each of the synthetic resin non-foamed molded bodies obtained in the above Examples and Comparative Examples in detail, we found that the following
! ! The results shown are obtained. The test method was to forcibly charge the battery by applying a voltage, and check the initial voltage and half-life of the voltage. As described in detail, according to the present invention, it is possible to provide a method for producing a non-foamed, non-static synthetic resin molded product.

Claims (1)

[Claims] (1) Add and mix 0.5 to 20 parts by weight of a quaternary ammonium salt and, if necessary, a crosslinking agent and ordinary additives for stable side parts to 100 parts by weight of a thermoplastic synthetic resin [IL, A method for producing a non-static and thermally foamed resin molded product, which is characterized by filling this into an arbitrary mold, heating it, and then removing it from the mold.
(2) Add and knead 0.5 to 20 parts by weight of a quaternary ammonium salt and, if necessary, a crosslinking agent and ordinary additives for the stable side to 100 parts by weight of the thermosetting synthetic resin]. Fill any mold